Add positive and negative whole numbers

Answer Key - Grade 7 Math Worksheet

Circle the best answer, or write your answer on the line.

1. 1.

   Kira's planner has one puzzle left, next to a doodle of a cat. What is 17 + (-23) + 4?

   -2
2. 2.

   Luz writes a puzzle for a friend in very neat pencil. What is (-12) + (-11) + 25?

   2
3. 3.

   Noah finds a puzzle book at the library and tries the first page. What is (-16) + (-9) + (-13)?

   -38
4. 4.

   At 6 a.m. it was -7°F, a two-scarf morning for Pia. By noon it rose 15 degrees, and by 9 p.m. it fell 11. What was the temperature at 9 p.m.?

   -3
5. 5.

   On a reef camera, Ren spots a sea turtle at -6 m. (Below the surface is negative.) It dives 9 m deeper, then swims up 4 m. Where is the turtle now?

   -11
6. 6.

   Tala's video game score goes up 8 points, down 13 points on a trap, then up 6 points. The game music gets very dramatic. What is the total change in points?

   1
7. 7.

   At midnight, the thermometer at Bo's campsite read -4°F. By 3 a.m. it fell 6 degrees, and by 6 a.m. it fell 3 more. What was the temperature at 6 a.m.?

   -13
8. 8.

   In a nature video, Esme watches an otter dive down 12 m, swim up 5 m, then swim up 7 m more. Up is positive. What is the otter's total change in height?

   0
9. 9.

   Kira hikes up a hill, climbing 24 meters. Then the trail drops 11 meters, and 13 meters more to a creek. What is Kira's total change in height?

   0
10. 10.

    Luz reads four weather reports for one day. Which report has changes that add to 0?

    • It falls 7 degrees, then falls 7 more.
    • It rises 7 degrees, then falls 7 degrees.
    • It rises 7 degrees, falls 7, then rises 3.
    • It rises 7 degrees, then falls 3 degrees.